Use the protoc from the build, not prebuilts/

The version of protoc in the prebuilts/tools project is ancient (2.5).
Instead, use the aprotoc binary from the build instead.

Test: ./gen_eccdata.sh
Test: creates same output/eccdata as before (ignoring gzip timestamp)
Bug: 136027884
Change-Id: I97cb17ac421126b118d4e053d31fe9210db40dd1
2 files changed